#define _CRT_SECURE_NO_WARNINGS 1
//#include <stdio.h>
////int main()
////{
////	printf("hello world\n");
////	return 0;
////
//////}
//#include <stdio.h>
//int main()
//{
//	printf("hello\nworld\n");
//	printf("hello\n");
//	printf("world\n");
//	return 0;
//}
//#include <stdio.h>
//int main()
//{
//	printf("There are %d apples\n", 3);
//	return 0;
//
//}
//#include <stdio.h>
//int main()
//{
//	printf("%s will come tonight\n","zhangsan");
//	return 0;
//
//}
//#include <stdio.h>
//int main()
//{
//	printf("%s says it is %d o'clock\n", "list", 15);
//	return 0;
//
//
//}
#include <stdio.h>
int main()
{
	printf("%12f\n",123.45);
	return 0;

}